一种气垫船远场波形理论计算方法

Theoretical Calculation of Wave Profile in Far Field of Surface Effect Ship

将Noblesse新细长船理论应用于气垫船 ,通过Lagrang多项式和第一类球Bessel函数展开波幅函数中的指数函数 ,改进了计算方法 .通过引入基元波波陡限制来综合考虑非线性等因素 ,目的在于探讨一种简便、快速而有效的气垫船兴波阻力和远场波形理论计算方法 .以模型为例 ,针对不同的气垫压力面边缘压力分布形式计算了远场波形 .采用Pentium/PC计算一条波形仅需十几秒钟。理论结果与实验波形吻合较好 .结果表明 。

The computation method was improved by applying the modified Noblesse's new slender ship theory to surface effect ship and extending the exponent functions utilizing the Lagrange polynomial and the first kind of sphere Bessel function .The influences of nonlinear factors is considered by restricting the etementary wave steepness.The present study aims at establishing a simple,fast and efficient computation method for computation of the wave resistance and wave profile in far field generated by surface effect ship.For example,wave profiles in a far field generated by a model were computed for different pressure distributions over the edge of an air cushion pressure surface.It takes less than 20 seconds to get a wave profile curve in Pentium/PC.The computed results are in good agreement with the measured ones,which shows the feasibility and the correctness of te computation method.